1、emq介绍

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2、安装emq

环境是centos7.2，
http://www.emqtt.com/downloads
对应的包地址是http://www.emqtt.com/downloads/3104/centos7

下载安装包

wget http://www.emqtt.com/downloads/3104/centos7

解压安装包

unzip centos7 

查看目录

[root@iZwz94wxzv9g5iqyr8h3ktZ home]# ls
centos7  emqx  jboot  www  wwwlogs  wwwroot
[root@iZwz94wxzv9g5iqyr8h3ktZ home]# 

3、运行emq相关命令行

https://developer.emqx.io/docs/emq/v3/cn/getstarted.html#emq

启动emqx

./bin/emqx start

检查运行状态

./bin/emqx_ctl status

[root@iZwz94wxzv9g5iqyr8h3ktZ emqx]# ./bin/emqx_ctl status
Usage: emqx_ctl
--------------------------------------------------------------------------------
rules list                                      # List all rules
rules show <RuleId>                             # Show a rule
rules create                                    # Create a rule
rules delete <RuleId>                           # Delete a rule
--------------------------------------------------------------------------------
rule-actions list                               # List all actions
rule-actions show <ActionId>                    # Show a rule action
--------------------------------------------------------------------------------
resources list                                  # List all resources
resources show <ResourceId>                     # Show a resource
--------------------------------------------------------------------------------
resource-types list                             # List all resource-types
resource-types show <Type>                      # Show a resource-type
--------------------------------------------------------------------------------
recon memory                                    # recon_alloc:memory/2
recon allocated                                 # recon_alloc:memory(allocated_types, current|max)
recon bin_leak                                  # recon:bin_leak(100)
recon node_stats                                # recon:node_stats(10, 1000)
recon remote_load Mod                           # recon:remote_load(Mod)
--------------------------------------------------------------------------------
retainer info                                   # Show the count of retained messages
retainer topics                                 # Show all topics of retained messages
retainer clean                                  # Clean all retained messages
--------------------------------------------------------------------------------
admins add <Username> <Password> <Tags>         # Add dashboard user
admins passwd <Username> <Password>             # Reset dashboard user password
admins del <Username>                           # Delete dashboard user

停止emqx

./bin/emqx stop

4、控制台

EMQ X 消息服务器启动后，会默认加载 Dashboard 插件，启动 Web 管理控制台。用户可通过 Web 控制台，查看服务器运行状态、统计数据、客户端(Client)、会话(Session)、主题(Topic)、订阅(Subscription)、插件(Plugin)。

控制台地址: http://127.0.0.1:18083，默认用户: admin，密码：public

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5、测试emq

下载mqtt客户端测试工具
https://repo.eclipse.org/content/repositories/paho-releases/org/eclipse/paho/org.eclipse.paho.ui.app/1.0.2/

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运行paho客户端

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新建连接，填入emq的ip地址；
publish主题和接受都正常。

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后续补充上集群方式。

全文完。